How Long Does Advertising Agency Implementation Actually Take? A Realistic Timeline for Every Channel

Every business owner hiring an advertising agency asks the same question: how long is this going to take? The honest answer depends entirely on what channels you're running — a Google Ads campaign can be live in two weeks while a TV commercial takes up to 20 weeks from brief to air. This guide breaks down realistic implementation timelines for every major advertising channel, what happens during onboarding, and when you should actually expect to see results — so you can set the right expectations before you sign anything.